I have seen and spoken to a few people that swear by the factory 911 aircooled press in studs as opposed to the thread in. I am currently running the rennline which seem okay, but I have read about some breaking on the track. Thoughts or experiences??

 

Studs are consumables. They break. Rears need replacing almost yearly. I broke 4 in turn 12 at Road Atlanta. Literally 1 stud kept me from a very bad crash. On flat tracks its not as bad, but ones with high compressive forces like Road Atlanta will eat them up. A friend of mine has a GT3 R and had a wheel come off. Same track. I don't remember the brand but they are the best around and still break. I did have some from a boxster racing place in Cali that lasted longer, can't remember names at this point but they installed with an Allen wrench on the flat end. If you run compressive tracks, have good amounts of downforce and run Hoosiers DOT or better, replace rears yearly. Cheap insurance. Fronts should last 2-3 seasons of track days.

 

Stop reading negative threads on the internet. Sure if racing (and mayyyyybe the street) they are consumables, but they're not snapping like twigs here. I've used em for many, many years w/out issue. My P car ones been on for years untouched in great shape.

 

Does ARP or someone make a stronger one? Seems like a bad engineering issue w/ Porsche to have made it where the lugs / studs / whatever will snap, even with race rubber. Never heard of that on any other car with race rubber?

 

ARP break like the rest of them. Pretty sure the ones I broke were ARP.

Never had a problem with lug bolts though. Just studs. Can't blame Porsche.

 

This is pretty much the heart of the point I am trying to get info on. Everyone runs the aftermarket studs here and claims they break, but nobody runs the older factory Porsche aircooled press in ones. The down side is having to drill to press them in. But if they are more durable than the aftermarket alternatives than it seems like it is worth the modding of the hubs. The guy who suggested to run these is a race engineer. So seemed like the idea had merit. I was just hoping to find someone who had tried them.

 

But there's many who run screw in studs w/out issues. Only people come here to complain, no one is gonna write, hey my studs still working as intended! Think about it. I wouldn't worry about them failing. Inspect them often. Change as maintenance if so desired. I don't see a need to go to a press in stud.

 

Based on the original post, concerning track, most everyone who runs them on track car regularly replaces them regularly. I'm just here to answer a question that was posed. Broken studs can be a very costly mistake. If you are on street tires in a novice group, or mostly street driving, it's not nearly as big of an issue. But if you track on sticky tires in advanced groups, they are going to break. Period.

They are inexpensive and easy to replace. They don't need advocacy. They are wheel studs, a basic replacement part.

 

I don't discount the need to replace the thread in studs. Never questioned that. I just want to know if anyone has run the press in ones and their experiences. My apologies if I did not clearly ask that. If/when I run thread in studs, they will be replaced as a wear item. But if the press in studs are a better more reliable option that is not as failure prone as the thread in ones then I would prefer that versus the replace and pray they don't snap approach.

 

Personally I keep lugs with me at all times just in case. It's pretty easy to extract a broken stud and save your weekend. I almost quit the studs altogether after the near incident. I wouldnt trust anything to last forever. Press In seems like a harder to replace item should you be at the track and maybe one fails. Nothing is invincible.

 

just run bolts all the time and not have to worry... never understood the big drive to go the stud route, slightly easier to install wheels and all the hassle of torqueing studs and breakage...

 

Cause all things considered a part clamped on is better than a part bolted on, at least IMO.

 

 

 

I don't know why they would do that. Studs are not stronger What region is this?

That is not the same as track use. The temps reached and extreme heat cycling combined with lateral g and braking forces cause them to fail. You can run them on the street forever. Maybe even novice track guys on street tires or r compounds for a few years. Once you get to Hoosier/slicks etc. The need to be replaced.

You can replace them at regular intervals or be hard headed and hate yourself when they snap on you. They are fairly cheap and take a hr or two to replace. Is it really worth the risk........no.